[PATCH V4 4/7] soc: imx: add i.MX93 SRC power domain driver
Peng Fan (OSS)
peng.fan at oss.nxp.com
Thu Jun 9 05:50:57 PDT 2022
From: Peng Fan <peng.fan at nxp.com>
Support controlling power domain managed by System Reset
Controller(SRC). Current supported power domain is mediamix power
domain.
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
drivers/soc/imx/Kconfig | 10 ++
drivers/soc/imx/Makefile | 1 +
drivers/soc/imx/imx93-pd.c | 271 +++++++++++++++++++++++++++++++++++++
3 files changed, 282 insertions(+)
create mode 100644 drivers/soc/imx/imx93-pd.c
diff --git a/drivers/soc/imx/Kconfig b/drivers/soc/imx/Kconfig
index a840494e849a..5bfc1dfea28b 100644
--- a/drivers/soc/imx/Kconfig
+++ b/drivers/soc/imx/Kconfig
@@ -20,4 +20,14 @@ config SOC_IMX8M
support, it will provide the SoC info like SoC family,
ID and revision etc.
+config SOC_IMX9
+ tristate "i.MX9 SoC family support"
+ depends on ARCH_MXC || COMPILE_TEST
+ default ARCH_MXC && ARM64
+ select SOC_BUS
+ select PM_GENERIC_DOMAINS
+ help
+ If you say yes here you get support for the NXP i.MX9 family
+ support.
+
endmenu
diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index 63cd29f6d4d2..e3ed07a6bcf9 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
obj-$(CONFIG_SOC_IMX8M) += imx8m-blk-ctrl.o
obj-$(CONFIG_SOC_IMX8M) += imx8mp-blk-ctrl.o
+obj-$(CONFIG_SOC_IMX9) += imx93-pd.o
diff --git a/drivers/soc/imx/imx93-pd.c b/drivers/soc/imx/imx93-pd.c
new file mode 100644
index 000000000000..d4f8a8941759
--- /dev/null
+++ b/drivers/soc/imx/imx93-pd.c
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2022 NXP.
+ */
+
+#include <linux/clk.h>
+#include <linux/of_device.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <dt-bindings/power/fsl,imx93-power.h>
+
+#define IMX93_SRC_MEDIAMIX_OFF 0x2400
+
+#define MIX_SLICE_SW_CTRL_OFF 0x20
+#define SLICE_SW_CTRL_PSW_CTRL_OFF_MASK BIT(4)
+#define SLICE_SW_CTRL_PDN_SOFT_MASK BIT(31)
+
+#define MIX_FUNC_STAT_OFF 0xB4
+
+#define FUNC_STAT_PSW_STAT_MASK BIT(0)
+#define FUNC_STAT_RST_STAT_MASK BIT(2)
+#define FUNC_STAT_ISO_STAT_MASK BIT(4)
+
+struct imx93_slice_info {
+ char *name;
+ u32 mix_off;
+};
+
+struct imx93_plat_data {
+ u32 num_slice;
+ struct imx93_slice_info *slices;
+};
+
+struct imx93_power_domain {
+ struct generic_pm_domain genpd;
+ struct device *dev;
+ void * __iomem base;
+ const struct imx93_slice_info *slice_info;
+ struct clk_bulk_data *clks;
+ int num_clks;
+};
+
+#define to_imx93_pd(_genpd) container_of(_genpd, struct imx93_power_domain, genpd)
+
+struct imx93_slice_info imx93_slice_infos[] = {
+ [IMX93_POWER_DOMAIN_MEDIAMIX] = {
+ .name = "mediamix",
+ .mix_off = IMX93_SRC_MEDIAMIX_OFF,
+ }
+};
+
+struct imx93_plat_data imx93_plat_data = {
+ .num_slice = ARRAY_SIZE(imx93_slice_infos),
+ .slices = imx93_slice_infos,
+};
+
+static int imx93_pd_on(struct generic_pm_domain *genpd)
+{
+ struct imx93_power_domain *domain = to_imx93_pd(genpd);
+ const struct imx93_slice_info *slice_info = domain->slice_info;
+ void * __iomem addr = domain->base + slice_info->mix_off;
+ u32 val;
+ int ret;
+
+ ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
+ if (ret) {
+ dev_err(domain->dev, "failed to enable clocks for domain: %s\n", genpd->name);
+ return ret;
+ }
+
+ val = readl(addr + MIX_SLICE_SW_CTRL_OFF);
+ val &= ~SLICE_SW_CTRL_PDN_SOFT_MASK;
+ writel(val, addr + MIX_SLICE_SW_CTRL_OFF);
+
+ ret = readl_poll_timeout(addr + MIX_FUNC_STAT_OFF, val,
+ !(val & FUNC_STAT_ISO_STAT_MASK), 1, 10000);
+ if (ret) {
+ dev_err(domain->dev, "pd_on timeout: name: %s, stat: %x\n", genpd->name, val);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int imx93_pd_off(struct generic_pm_domain *genpd)
+{
+ struct imx93_power_domain *domain = to_imx93_pd(genpd);
+ const struct imx93_slice_info *slice_info = domain->slice_info;
+ void * __iomem addr = domain->base + slice_info->mix_off;
+ int ret;
+ u32 val;
+
+ /* Power off MIX */
+ val = readl(addr + MIX_SLICE_SW_CTRL_OFF);
+ val |= SLICE_SW_CTRL_PDN_SOFT_MASK;
+ writel(val, addr + MIX_SLICE_SW_CTRL_OFF);
+
+ ret = readl_poll_timeout(addr + MIX_FUNC_STAT_OFF, val,
+ val & FUNC_STAT_PSW_STAT_MASK, 1, 1000);
+ if (ret) {
+ dev_err(domain->dev, "pd_off timeout: name: %s, stat: %x\n", genpd->name, val);
+ return ret;
+ }
+
+ clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
+
+ return 0;
+};
+
+static const struct of_device_id imx93_power_domain_ids[] = {
+ { .compatible = "fsl,imx93-src", .data = &imx93_plat_data, },
+ {},
+};
+
+static int imx93_pd_remove(struct platform_device *pdev)
+{
+ struct imx93_power_domain *pd = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+ const struct imx93_plat_data *data = of_device_get_match_data(dev);
+ u32 num_domains = data->num_slice;
+ struct device_node *slice_np, *np;
+ int ret;
+
+ slice_np = of_get_child_by_name(pdev->dev.of_node, "slice");
+
+ for_each_child_of_node(slice_np, np) {
+ struct imx93_power_domain *domain;
+ u32 index;
+
+ if (!of_device_is_available(np))
+ continue;
+
+ ret = of_property_read_u32(np, "reg", &index);
+ if (ret) {
+ dev_err(dev, "Failed to read 'reg' property\n");
+ of_node_put(np);
+ return ret;
+ }
+
+ if (index >= num_domains) {
+ dev_warn(dev, "Domain index %d is out of bounds\n", index);
+ continue;
+ }
+
+ domain = &pd[index];
+
+ of_genpd_del_provider(np);
+
+ pm_genpd_remove(&domain->genpd);
+ clk_bulk_put_all(domain->num_clks, domain->clks);
+ };
+
+ return 0;
+}
+
+static int imx93_pd_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct imx93_plat_data *data = of_device_get_match_data(dev);
+ const struct imx93_slice_info *slice_info = data->slices;
+ struct imx93_power_domain *pd;
+ u32 num_domains = data->num_slice;
+ struct device_node *slice_np, *np;
+ void __iomem *base;
+ bool is_off;
+ int ret;
+
+ slice_np = of_get_child_by_name(dev->of_node, "slice");
+ if (!slice_np) {
+ dev_err(dev, "No slices specified in DT\n");
+ return -EINVAL;
+ }
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ pd = devm_kcalloc(dev, num_domains, sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, pd);
+
+ for_each_child_of_node(slice_np, np) {
+ struct imx93_power_domain *domain;
+ u32 index;
+
+ if (!of_device_is_available(np))
+ continue;
+
+ ret = of_property_read_u32(np, "reg", &index);
+ if (ret) {
+ dev_err(dev, "Failed to read 'reg' property\n");
+ of_node_put(np);
+ return ret;
+ }
+
+ if (index >= num_domains) {
+ dev_warn(dev, "Domain index %d is out of bounds\n", index);
+ continue;
+ }
+
+ domain = &pd[index];
+
+ domain->num_clks = of_clk_bulk_get_all(np, &domain->clks);
+ if (domain->num_clks < 0) {
+ return dev_err_probe(domain->dev, domain->num_clks,
+ "Failed to get %s's clocks\n",
+ slice_info[index].name);
+ }
+
+ domain->genpd.name = slice_info[index].name;
+ domain->genpd.power_off = imx93_pd_off;
+ domain->genpd.power_on = imx93_pd_on;
+ domain->slice_info = &slice_info[index];
+ domain->base = base;
+
+ is_off = readl(domain->base + slice_info->mix_off + MIX_FUNC_STAT_OFF) &
+ FUNC_STAT_ISO_STAT_MASK;
+ /* Just to sync the status of hardware */
+ if (!is_off) {
+ ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks);
+ if (ret) {
+ dev_err(domain->dev, "failed to enable clocks for domain: %s\n",
+ domain->genpd.name);
+ clk_bulk_put_all(domain->num_clks, domain->clks);
+ return 0;
+ }
+ }
+
+ dev_info(dev, "%s: state: %x\n", domain->genpd.name,
+ readl(domain->base + MIX_FUNC_STAT_OFF));
+ ret = pm_genpd_init(&domain->genpd, NULL, is_off);
+ if (ret) {
+ dev_err(dev, "failed to init genpd\n");
+ clk_bulk_put_all(domain->num_clks, domain->clks);
+ return ret;
+ }
+
+ ret = of_genpd_add_provider_simple(np, &domain->genpd);
+ if (ret) {
+ clk_bulk_put_all(domain->num_clks, domain->clks);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct of_device_id imx93_dt_ids[] = {
+ { .compatible = "fsl,imx93-src", .data = &imx93_plat_data, },
+ { }
+};
+
+static struct platform_driver imx93_power_domain_driver = {
+ .driver = {
+ .name = "imx93_power_domain",
+ .owner = THIS_MODULE,
+ .of_match_table = imx93_dt_ids,
+ },
+ .probe = imx93_pd_probe,
+ .remove = imx93_pd_remove,
+};
+module_platform_driver(imx93_power_domain_driver);
+
+MODULE_AUTHOR("Peng Fan <peng.fan at nxp.com>");
+MODULE_DESCRIPTION("NXP i.MX93 power domain driver");
+MODULE_LICENSE("GPL v2");
--
2.25.1
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